Predictions: at best some incoherent rant that they can but won't do it for some bullshit reason
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You completely misunderstand. We predict eclipses and generate equations to extrapolate them based on charts - not models.
There are plenty of civilizations which "modeled" the world as flat which also had charts of when eclipses occurred.
The shape of the world is not involved in such things at all.
Beyond that, models are merely tools for limited use - not proof of anything in reality.
We have working astronomical models for the earth being the center of the universe (and assuming the earth a flat plane, as it appears experientially to us). Does that prove that the earth is the center of the universe?
It is trivial to create a model assuming anything you like - reality doesn't care.
Okay, well then we've still got an issue with the contradiction in what we've discussed on gasses and how pressure is lower at higher atmospheres.
Either gas is ever expanding or gas is at rest upon the particles below it. Both cannot be simultaneously true.
No one ever said that gas is ever expanding, that is purely your misunderstanding. Gas always expands to fit the container. Not "gas always expands forever with eternal limitless energy"....
Precisely what I mean. If the gas is expanding to fit the container, then it wouldn't be resting on other particles.
Except that is explicitly not what you said. Expanding to fit an available volume is not infinite expansion, obviously.
Firstly, expansion occurs in all directions... Secondly, once expansion is no longer occurring (due to reaching equilibrium/rest/the confines of the container walls), the particles of course would be resting on one another (as they are during expansion as well...)
You seem to imagine that expansion precludes falling - or they are somehow mutually exclusive. Imagine a squished foam ball (or spring) being dropped...